the u.s., france, britain, russia, china. since last round of talks last june, iran's uranium enrichment program has expanded violating u.n. resolutions. >> iran's claiming its program is for civilian use only, energy and such things but western leaders fear iran is building a nuclear bomb. >>> canada, a group of scientists is now calling for food to be dna tested to make sure these things, products, are what they say they really are. >> now paula newton will report test willing keep horse meat from ending up in beef products and other types of food fraud. >> reporter: with all of the new food scares i bet you're wondering if there's any way to know for sure exactly what you're eating and what you're giving your family. so we've come here to canada, the university, in the biodiversity institute of ontario. chris wheeland is here. you used to be doing this for crime scenes. what we're starting with are ikea meatballs. >> all we really need is a 1 millimeter piece. >> reporter: a scrap of food, that's all it takes to screen and